cutting doorway into limestone wall

[BMan]

i have heard to cut a doorway into a limestone wall you cut a slot and put a piece of angle iron in as a steel lintel then cut your doorway out underneath
is this correct?

how deep does the angle iron need to go?
how far below the angle iron can the cut go?

 

[jim1964]

A lintel would be better.

http://www.axiominspection.com/images/g_lintel.jpg

 

[AlmostBob]

as jims replay, a lintel
in stone must be 100% of the wall
lintel, as 2 pieces, one inserted for ~60% of wall thickness from each side (overlap)
limestone is not tension stable, and heavier than brick so you will need a competent person to calculate the thickness of steel to support the weight
ideally a recurve section to properly support without allowing flex

 

[Tigerboy]

Bman depending on which state you're in, you may need a building permit too.

I'd get an experienced person to do it, otherwise the whole thing could collapse.

 

[BMan]

ok thanks guys will get builder to look at it when i get him in to do other
stuff